Saw-mill



(No'Model.)

J. C. WUERFEL.

SAW MILL.

Patented Feb.20, 1883.

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N. FIETERS. Pimm-Lnognpmr. wnhingmn. n.6.

UNITE STATES PATENT OFFICE.

J OHN O. WUERFEL, OF TOLEDO, OHIO.

SAW-MILL.

SPECIFICATION forming partof Letters Patent No. 272,610, dated February 20, 1883.

Application tiled December 1, 1882. (No model.) i

To all whom it may concern l Be it known that I, JouN O. WUERFEL, a

Acitizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented a new and useful Saw-Mill, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to head-blocks or carriages for saw-mills; and it consists in certain improvements in the construction of the same,whirh will be hereinafter fully described, and particularly pointed out in the claim.

In the drawings, Figure 1 is a perspective view of a saw-mill head-block or carriage to which my invention has been applied, and Fig. 2 is a detail view.

'Ihe same letters refer to the same parts in both figures.

In saw-mill carriages, as heretofore coustructed, various kinds of mechanism have been heretofore employed to move the knees back from the saw aftera log has been sawed down, in order to make room for the next log; but, so far as I am aware, this retrograde movement of the knees has always been effected after the carriage has been returned to its position in front of the saw, thus making it necessary to keep the mill out of operation while this movement was effected. Now, the object of my invention is to save the time usually consumed in moving the knees back by effecting this during the backward movement of the carriage, as'I shall now proceed more fully to describe with reference to the drawings, in which- A represents the frame of the saw-mill carriage, which is constructed in the usual manner, and adapted to slide or move upon a suitably-constructed track. Said carriage is provided withvtransverse guides or tracks for the knees or head-blocks B B, which are adapted to be moved by any suitable mechanism upon the said tracks in a forward direction, so as to feed the log forward to the saw.

Osa'ent or bell crank lever, pivoted be tween the front ends or arms of a ,voke,D, and having a downward-projecting arm or strap, E, pivoted upon a bolt, F, between a pair of ears or lugs, G G, upon the carriage. The

rear end of the yoke D has a shaft, E, upon which is journaled a frictionwheel,I, adapted to bear against and operate another frictionwheel, J, mounted upon the shaft K of the setwheelL. Said set-wheel engages in the usual manner miter wheels or pirions M M upon a longitudinal shaft, N, the ends of which carry pinions O O, adapted, through any suitable intermediate mechanism, to actuate the knees.l The ends of the shaft H project slightly beyond the yoke D, and are adapted to slide in slots P 1n a pair of straps, Q Q, which connect the ears or lugs G G with a pair ot' similar ears, R It, secured upon the carriage. When the lever O is manipulated the slots P guide the friction-wheel I in a rearward and downward direction until it strikes the friction-wheel J, and at the same time strikes a track or rail, S, secured upon the floor of the mill adjoining and parallel vto the carriage.

rlhe operation of my invention will be readily understood from the foregoing description, taken in connection with thedrawings hereto annexed. When a log has been sawed up, and the carriage is to be returned for the purpose of taking on a newlog,the saw) er or attendant depresses the lever O, thus throwing the fliction-wheel l into engagement with both the friction-wheel J and the track-rail S. As, by the usual proper machinery, the carriage is returned the friction-wheel I, by contact with the track-rail, is revolved, thus revolving the friction-wheel J, which itengages,and moving the knees B B back upon the carriage, and making room for the next log. When released the lever O automatically returns to its original position.

I am aware ot' the patent to Russell, No. 121.664, of December 5, 187l, and I claim nothing therein shown.

I claim as myinvention and desire to secure b v Letters Patent of the United StatesrIhe combination and arrangement, as described, ot' the saw-mill carriage, the set-wheel shaft having a friction-wheel, the yoke having a shaft sliding iu suitable guide-slots, and carrying a friction-wheel adapted to engage simultaneously the friction-wheel upon the set-wheel shaft and a track-rail secured upon the oor of the mill, and a bent or bell-crank lever adapted to operate the voke,all as herein described, for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence ot' two witnesses.

JOHN CARL WUERFEL.

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